fix: smkx keypad-transmit mode (#367)
fix: smkx keypad-transmit mode (#367)

* fix: smkx keypad-transmit mode.

* chore: remove unreachable code.

* review: split application and normal mode and add links to doc.

* review

* review: full rewrite

* feat: use KeyEscape constant

* doc: add method godoc
AlecAivazis/survey